Noticed this while using the Cluster API provider, but I can reproduce without CAPN. Asking here instead of opening a ticket because I suspect this is somehow Nvidia drivers giving me yet another headache, but I’ll take any advice or bring this to any other platform if suggested.
When a new machine with a certain combination of settings starts, my X window session crashes and I need to log in again. My machine(s) are still running in the background the whole time.
Here’s the minimal machine config I’ve been able to come up with to reproduce by just running
incus launch images:debian/12 u1 < config.yaml
Where config.yaml is:
architecture: x86_64
config:
image.architecture: amd64
image.description: Debian bookworm amd64 (20260225_05:24)
image.os: Debian
image.release: bookworm
image.serial: "20260225_05:24"
image.type: squashfs
image.variant: default
raw.lxc: |
lxc.apparmor.profile=unconfined
lxc.mount.auto=proc:rw sys:rw cgroup:rw
security.privileged: "true"
devices: {}
ephemeral: false
profiles:
- default
stateful: false
description: ""
The key part being what’s in config.raw.lxc. Those 2 values in conjunction ( lxc.apparmor.profile=unconfined and lxc.mount.auto=proc:rw sys:rw cgroup:rw), and not by themselves, are what makes the difference for me. Other base images seem to hit this too.
The logs that seem closest to the issue that I’ve been able to gather so far are these from /var/log/Xorg.0.log (adding such a large block of logs because these lines seem to be different from the routine logs when compared to other sessions, sorry if they’re noise):
[ 17540.104] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input0/event0"
[ 17540.104] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 11)
[ 17540.104] (**) Option "xkb_model" "pc105"
[ 17540.104] (**) Option "xkb_layout" "es"
[ 17540.104] (WW) Option "xkb_variant" requires a string value
[ 17540.104] (WW) Option "xkb_options" requires a string value
[ 17540.106] (II) event0 - Sleep Button: is tagged by udev as: Keyboard
[ 17540.106] (II) event0 - Sleep Button: device is a keyboard
[ 17540.109] (II) config/udev: removing GPU device /sys/devices/pci0000:00/0000:00:02.0/drm/card1 /dev/dri/card1
[ 17540.109] xf86: remove device 1 /sys/devices/pci0000:00/0000:00:02.0/drm/card1
[ 17540.109] failed to find screen to remove
[ 17540.110] (II) config/udev: removing device Power Button
[ 17540.110] (II) event1 - Power Button: device removed
[ 17540.120] (II) UnloadModule: "libinput"
[ 17540.121] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[ 17540.121] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[ 17540.121] (II) Using input driver 'libinput' for 'Power Button'
[ 17540.121] (**) Power Button: always reports core events
[ 17540.121] (**) Option "Device" "/dev/input/event1"
[ 17540.122] (II) event1 - Power Button: is tagged by udev as: Keyboard
[ 17540.122] (II) event1 - Power Button: device is a keyboard
[ 17540.122] (II) event1 - Power Button: device removed
[ 17540.130] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input1/event1"
[ 17540.130] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 10)
[ 17540.130] (**) Option "xkb_model" "pc105"
[ 17540.130] (**) Option "xkb_layout" "es"
[ 17540.130] (WW) Option "xkb_variant" requires a string value
[ 17540.130] (WW) Option "xkb_options" requires a string value
[ 17540.132] (II) event1 - Power Button: is tagged by udev as: Keyboard
[ 17540.132] (II) event1 - Power Button: device is a keyboard
[ 17540.135] (II) config/udev: Adding input device Lid Switch (/dev/input/event2)
[ 17540.135] (II) No input driver specified, ignoring this device.
[ 17540.135] (II) This device may have been added with another device file.
[ 17540.135] (II) config/udev: removing GPU device /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card2 /dev/dri/card2
[ 17540.135] xf86: remove device 0 /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card2
[ 17540.143] (II) UnloadModule: "nvidia"
[ 17540.143] (II) UnloadSubModule: "glxserver_nvidia"
[ 17540.143] (II) Unloading glxserver_nvidia
[ 17540.143] (II) UnloadSubModule: "wfb"
[ 17540.144] (EE)
[ 17540.144] (EE) Backtrace:
[ 17540.148] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x14c) [0x6501baee10cc]
[ 17540.149] (EE) 1: /lib/x86_64-linux-gnu/libc.so.6 (__sigaction+0x50) [0x724bd3045330]
[ 17540.149] (EE) 2: /usr/lib/xorg/Xorg (RRTellChanged+0x2a2) [0x6501bae22f12]
[ 17540.149] (EE) 3: /usr/lib/xorg/Xorg (xf86PlatformDeviceCheckBusID+0x36b) [0x6501badc7adb]
[ 17540.149] (EE) 4: /usr/lib/xorg/Xorg (config_fini+0x9ce) [0x6501badc35be]
[ 17540.149] (EE) 5: /usr/lib/xorg/Xorg (config_fini+0x1648) [0x6501badc4238]
[ 17540.150] (EE) 6: /usr/lib/xorg/Xorg (OsCleanup+0x64a) [0x6501baee1b9a]
[ 17540.150] (EE) 7: /usr/lib/xorg/Xorg (WaitForSomething+0x185) [0x6501baeda4f5]
[ 17540.150] (EE) 8: /usr/lib/xorg/Xorg (SendErrorToClient+0x11a) [0x6501bad6186a]
[ 17540.150] (EE) 9: /usr/lib/xorg/Xorg (InitFonts+0x3ca) [0x6501bad65eda]
[ 17540.152] (EE) 10: /lib/x86_64-linux-gnu/libc.so.6 (__libc_init_first+0x8a) [0x724bd302a1ca]
[ 17540.153] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0x8b) [0x724bd302a28b]
[ 17540.153] (EE) 12: /usr/lib/xorg/Xorg (_start+0x25) [0x6501bad4e395]
[ 17540.153] (EE)
[ 17540.153] (EE) Segmentation fault at address 0x34
[ 17540.153] (EE)
Fatal server error:
[ 17540.153] (EE) Caught signal 11 (Segmentation fault). Server aborting
Anything I could do to try to stop this from happening?
